Service difficulty report · Crease Beam · Boeing 7377BD

Difficulty date
December 10, 2022
Submitted
January 30, 2023
Operation
Air carrier
Aircraft
N7744A
Make and model
Boeing 7377BD
Aircraft serial
33931
Aircraft time
51,253 hours, 26,798 cycles
Part
Crease Beam
Condition
Corroded
Location
Bs 578 Rbl59
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORRODED CREASE BEAM LOCATED AT BS 578 RBL 59 S-17R WL208. EVALUATED REWORKED AREA & FOUND WITHIN LIMITS IAW SRM 53-40-13-1A-1 4A(2)(A) ALLOWABLE DAMAGE 1 MEASURES AFTER REWORK ARE L= 2.330 INCHES W=1.300 INCHES. PERFORMED VISUAL INSPECTION ON AREA & NO FOUND EVIDENCE MORE DAMAGE. ULTRASONIC THICKNESS MEASURE PERFORMED ON REWORKED AREA IAW NDT PART 4; 51-00-00 PROCEDURE 3. THE MINIMUM REMAINING THICKNESS IS 0.147 IN. & THE INITIAL THICKNESS IS 0.160 IN. EVALUATED REWORKED AREA & FOUND WITHIN LIMITS IAW SRM 53-40-13-1A-1 4A(2)(A) ALLOWABLE DAMAGE 1 MEASURES AFTER REWORK ARE L= 2.330 INCHES W=1.300 INCHES. PERFORMED VISUAL INSPECTION ON AREA & NO FOUND EVIDENCE MORE DAMAGE. ULTRASONIC THICKNESS MEASURE PERFORMED ON REWORKED AREA IAW NDT PART 4; 51-00-00 PROCEDURE 3. THE MINIMUM REMAINING THICKNESS IS 0.147 IN. AND THE INITIAL THICKNESS IS 0.160 IN.

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